Scaling and root planing (SRP) and Adjunctive systemic antibiotics have been suggested in order to prohibit such remaining destructive infection (Van Winkelhoff et al 1996). The antibiotic should preferably be chosen based on microbiological diagnoses and the suggested pathogenic bacterial resistance profile (Mombelli AW & van Winkelhoff AJ 1997, Preus & Laurel 2003). However, such treatment has been reported with varying effects in clinical studies (Joyston-Bechal et al 1986, Lindhe et al 1983a, Lindhe et al 1983b, Bain et al 1994, Tinoco et al 1997, Ciancio et al 1982, Chavez et al 1995, Mahmod & Dolby 1987). Thus, adjunct antibiotics seem as effective/ineffective in reducing the number of recurrent infection as SRP.